Gun port closure



.Oct. 16, 1934. J, H. BUEKERS, JR

GUN PORT CLOSURE Filed Oct. 12. 1951 INVENTOR- Patented Oct. 16, 19341,977,040

IT -1 s r s 'EPATENT OFF C 1,977,040 I 1 1GU PO "c osn'ar. I v JenBuekers, Jr., Detroit, r H ermination October 12, i931,'seria1 No.5613,3910

\ 4 "4 Claims. (Cl.: 9 3 4...-

The present invention pertains to a novel cloample metal' around thesame, the rin'g'B has sure for the gun port formed through a wallmeminwardly extending lugs 12 and 13 which are acber such as abullet-proof glass partition in a bank commoda'ted in slots 14 cut inthe back ring 5, as or the side of an armored truck. The principal shownin Figure 2. The upper lug 12 is longer object of the invention is toprovide a simple and hasa depending stud 15 on which is mounted deviceof this character, readily opened by the a wire spring 16 coiled at 1'7around the adjacent thrust of a gun and affording a wide lateralamplistud 11 and having its free ends 18 inserted in the tude to a guninserted in the device. segments 9 as shown more clearly in Figures 3and A further object of the invention is to provide a 4. The ends 18 aretensioned towards each other .10 closure which permits a sightingtherethrough so that they tend to hold the segments 9 in conand whichexerts no downward pressure on the tact with each other and obstructingthe opening 7 barrel of the gun, so that a short as well as a longthrough the ring 3.

gun may be used. I r A pointed rib 20 is formed in the ring 3 at Theclosure comprises essentially a pair of clothe outer side of thesegments 9 and presents a .151 sure members for the port or opening,pivoted conical surface 21 flaring outwardly from the together so thatthey may be swung relatively to opening. The inner surfaces of thesegments 9 each other or together. These members are prefare flattenedto form plane surfaces 22 convergerably spherical on the outside and areformed ing forwardly or outwardly as may be seen in with fiat internalsurfaces which converge towards Figure 3. Finally, the back ring 5 hasopposed 0? the outside. A gun thrust against either fiat surbevels 23which converge towards the frame face readily finds its way to the jointbetween the ring 3 as shown in Figure 3. members and'then passes betweenthe members In the use of the device, the segments 9 are against theaction of a spring which tends to hold separated for passing a gun 19therebetween the members closed against each other. On withmerely bythrusting the gun against either of 'g'5fidrawal of the gun, the springbrings the members the surfaces 22. Due to the convergence of the intocontact with each other to close the gun port latter, the gun is guidedto the joint between the completely. segments and then is forced betweenthem,

The invention is fully disclosed by way of exspreading them apart to thedotted line position ample in the following description and in the shownin Figure 3, against the tension of the 305. accompanying drawing inwhich spring 16--18. The gun may readily be swung Figure 1 is a rearelevation of the device with laterally because of the pivotal mountingof the the back ring removed; segments on the frame 3 and is permitted awide Figure 2 is an elevation of the back ring; lateral range by theconical surface 21 and Figure 3 is a horizontal cross section; andbevels 23. i 351 Figure dis avertical cross section. The depending stud15 which supports the Reference to these views will now be made byspring maintains the closure in a normal cenway of like characters whichare employed to tered connection, that is, with the joint in thedesignate corresponding parts throughout. vertical diameter of theopening. In the ab- The device is applied toawall lwhich is formed senceof such a stud and spring arrangement,

4 ;;with an opening 2 for receiving the device as will the device mightbe swung open from the outside.

presently appear. The wall may consist of bullet- On spreading thesegments by forcing a gun proof glass, as in a bank, or maybe of sheetmetal, therethrough, a vertical opening is provided so as on an armoredtruck. that accurate aim may be taken. It will also The frame of thedevice comprises a ring 3 be seen that the segments now exert equalpres- 45 fitted in the opening 2 and having flange 4 engagsure laterallyin opposite directions against the 10 ing the outer surface of the wallaround the openbarrel of the gun, so that there is no undue iming. Aback ring 5 abuts the inner end of the pediment to accurate aiming. Thisarrangeframe ring 3 and engages the inner surface of the ment is to bedistin u s d f om other devices wall 1. The ring has tapped bosses 6 onits pewherein a single upwardly opening flap bears 50.;riphery, and thering 5 has registering holes '7, so down upon the gun obstructing theproper sight that the parts may be bolted together by studs 8. line andin fact prohibiting the use of a short Within the frame ring 3 aremounted a pair of barrelled revolver. A bullet fired against thesubstantial octopartite segments 9 which have spherical outer surface ofthe closure will obtheir ends pivotally attached to the frame ring byviously glance off except in the single case where -.'studs 11. In orderto take the studs and provide it might strike the vertical joint.- Inthis as well as in other cases, there is suflicient metal in the lugs 12and 13 behind the studs 11 to take the impact.

Although a specific embodiment of the invention has been illustrated anddescribed it will be understood that various alterations in the detailsof construction may be made Without departing from the scope of theinvention as indicated by the appended claims.

What I claim is 1. A gun port closure comprising a frame member definingan opening, a pair of closure members pivoted to each other and to saidframe member and covering said opening, and spring means tending to holdsaid closure members in contact with each other.

2. A gun port closure comprising a frame member defining an opening, apair of closure members pivoted to each other and to said frame memberand covering said opening, and spring means tending to hold said closuremembers in contact with each other, the rear or inner surfaces of saidclosure members converging to the joint between said members.

3. A gun port closure comprising a frame member defining an opening, apair of closure members pivoted to each other and to said frame memberand covering said opening, and spring means tending to hold said closuremembers in contact with each other, said members having convexlyspherical outer surfaces.

4. A gun port closure comprising a frame member defining an opening, apair of closure members pivotally connected together in said opening andcovering the same, a stud secured to said frame member adjacent thepivotal connection of said closure members, and a spring supported bysaid stud and entering said closure members, said spring being adjustedto bring said members together and hold them centered in said opening.

JOHN H. BUEKERS, JR.

